5973-21-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 5973-21-7 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 5,9,7 and 3 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 5973-21:
(6*5)+(5*9)+(4*7)+(3*3)+(2*2)+(1*1)=117
117 % 10 = 7
So 5973-21-7 is a valid CAS Registry Number.
5973-21-7Relevant articles and documents
Cyclopropanation of 3,4-dihydro-1 H-benzo[e][1,4]diazepine-2,5-diones
Lack, Oliver,Martin, Rainer E.
, p. 8207 - 8211 (2007/10/03)
A two step parallel synthesis protocol for the preparation of 1N-substituted spirobenzodiazepineones is described. Treatment of 4-methyl-3,4-dihydro-1H-benzo[e][1,4]diazepine-2,5-dione with a series of alkyl halides using a microwave-assisted heating prot